This checks for sigterm but otherwise is identical to the previous
behavior.

Author of the lines of code is probably Nicolas and or Anton
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This makes the code simpler to understand, though it results in an
unnecessary call to avcodec_find_decoder() if the stream won't be
decoded.

Signed-off-by: Alex Converse <alex.converse@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

And remove now pointless parameter.
Signed-off-by: Alex Converse <alex.converse@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Alex Converse <alex.converse@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Keep a per-OutputFile instance of it, thus making -fs work with multiple
output files.
Signed-off-by: Alex Converse <alex.converse@gmail.com>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

By replacing
if (foo)
    <do stuff>

with
if (!foo)
    continue;
<do stuff>

Allows us to get rid of forward InputStream declaration.

Keep a per-OutputFile instance of it, thus making -ss work with multiple
output files.

Keep a per-OutputFile instance of it, thus making -t work with multiple
output files.

Instead store output streams in the same way as input streams.

Subsequent cherry picks are based on code prior to this, thus this needs to be rebased
on HEAD by a volunteer.
This reverts commit b25d931a.

Move the stream specifier to the option name.

New streams are always added to the last output file.

Move find_codec_or_die(), choose_codec(), new_output_stream() and
read_avserver_streams() below transcode() where they belong.

It's only used in opt_output_file(), so move it right above
opt_output_file().

parse_forced_key_frames() is only used in new_video_stream(), so move it
right above new_video_stream().

The new option doesn't depend on its placement wrt -new* options (which
don't exist anymore) and works in a similar way as per-stream AVOptions.

-[vas]codec remain as aliases to -codec:[vas]

Nothing except x264 uses them and native x264 presets should be used
with private options.